DISCLAIMER/WARNING: Please PAY ATTENTION TO WHAT YOU'RE PURCHASING.
Starting 5/5, We will no longer verify if you understand what you're ordering. If you ordered incorrectly and items has been shipped then you will incur a 20% Restock FEE if you wish to cancel or do a return/refund.
If ANY of these Items are sold out/gray color/unable to select/crossed out, this means that the ENTIRE product is OUT of Stock.
If you select "NONE" for Lower Parts Kit (LPK) and/or Sights, this means the kit DOES NOT come with those items.
If you select "NONE" or "STANDARD" Ejector, this means you will received whatever ejector comes with your Lower Parts Kit (LPK)
If you select "UPGRADED" Ejector, this means you will received either a Gen4 or Gen5 G19x Upgraded Ejector. It's our choice what we include on your kit.
MDX Arms Build Kit Contents:
- Polymear80 80% Frame Kit with Jig and tooling - PF940CV1 (metal rails, newest version)
- Glock OEM Polymer Sights -OBVIOUSLY if the option says "none" this means its not included
- Lower Parts Kit (LPK) -OBVIOUSLY if the option says "none" this means its not included
- Slide Parts Kit (SPK) * Channel Liner Already installed on slides
- Match Grade Drop-In Barrel
- MDX Arms US Made CNC 416R Slide
*All Build Kits comes un-assembled.
*If you purchase Sights, They will come UNINSTALLED
Details About PF940CV1 80% Frame:
- Enhanced Ergonomics and Features
- High-Strength Reinforced Polymer Construction
- Aggressive and Adaptable Grip Texture
- Picatinny/STANAG Compliant Accessory Rail
- Blank Serialization Plate
- Stainless Steel Locking Block Rail System (LBRS™)
- Stainless Steel Rear Rail Module (RRM™)
- Hardened Pins for LBRS ™ and RRM™
- Complete Finishing Jig, Drill bits and End Mill Included
- Compatible with Glock® 19/23 Gen3 Components
- Patent Available
Details About OEM LPK:
- Locking Block Pin
- Trigger Pin
- Magazine Catch
- Magazine Catch Spring
- Slide Stop Lever
- Slide Lock
- Slide Lock Spring
- Trigger Spring
- Trigger Housing with Ejector
- Trigger with Trigger Bar
- 5.5lbs Connector
Details About SPK by Shadow System:
- Machined 17-4 stainless steel firing pin, standard weight and length
- Standard OEM specification extractor
- Firing Pin Spring, standard weight
- Firing Pin Spacer Sleeve
- 2 Spring Cups
- Machined 17-4 stainless steel extractor depressor plunger assembly
- Cover Plate
- Machined 17-4 stainless steel firing pin safety
- Firing Pin Safety Spring
- Channel Liner
Details About the Barrels:
- Available in RAW Stainless Steel (SS) or Black Nitride Finished
- Available in either Standard Cut or Threaded Barrel
- Threaded barrel will come with a Free Threaded Protector in either Black or SS Finish
- Black Nitride are 4150 Chrome Moly Vanadium .40S&W with 1:16 Twist
- SS are 416R Stainless Steel 9mm with 1:16 Twist.
- Glock Gen. 1-4 Compatible
- Made in the USA
Details About the Slides:
- Machined from USA Grade 416R Stainless Steel Stock
- Front Serration
- Compatible with Glock Gen 1-3 OEM
- Cerakote Finish - Available in Black/FDE
- Made in USA
Ejector Upgrades: Upgrade Your standard style Ejector with either #30274 Gen.4 Ejector or Gen5 G19x #47021 for better ejection pattern. No more brass in the face! - Dealers Choice!
Check our How To Video Section for guide and tricks about your build:
MDX Arms does not sell firearms. This is not a firearm and will ship directly to you without FFL needed
We do not ship 80% to New Jersey
Please refer to your state and federal laws about 80% kits. It's your responsibility to know your own laws.
We're not responsible for any improper milling, installation of parts, damage or any injury that might occur. Make sure to use proper safety equipment during your build
“GLOCK” is a federally registered trademark of Glock, Inc. and is one of many trademarks owned by Glock, Inc. or Glock Ges.m.b.H. MDX Arms is not affiliated with nor endorsed by Glock, Inc. or Glock Ges.m.b.H.
8 Reviews Hide Reviews Show Reviews
great build and very easy going
great product, awesome prices, great company, no complaints.
I like the price but I have found wear marks on the Glock finish parts pins and such have wear marks as showing used.
Great deal . Also good for learning about firearm safety. Putting this together was very useful for advancing my knowledge. Very easy and I saved money. Thanks a lot.
Im very happy with it out the box first 100 rds feel great to shoot very happy customer
The slide racked up beautifully and fired no issues. Definitely recommend mdx.
first time builder diagram would be nice
For the price it’s outstanding great build end product is amazing it’s a must get